14. "Activity Lucky Bag" added. Complete missions to receive rewards, awesome new items are awaiting! Period: Jul 25th-Jul 31st Requirements: Players must reach Level 6 in order to participate. How To: a) Click “View Details” in the right bottom of the interface to check the missions. b) Complete the required missions to get activity points. Lucky bags can be opened with ac*ulative amounts of the points. You can open 25 bags per day in total, which will randomly drop these items: Coins, Refine Rune, Izuna Uchiha, Chiriku, Kinkaku, Sakura[Cloak], Lv2.Magatama, Seal Scroll, Stamina potion etc.

From the latest event thread.

1 Frag

Considering its extremely rare, odds are 0 out of 25 bags a day.

You must not know this event very well then if you're that optimistic.